What is the slurry pipeline?
The slurry pipeline is a mixture of particulate solid matter and a liquid delivery medium, which is transported by means of pumping and is separated at the destination. The conveying medium is usually made of water. Long ore pulp pipeline can transport the material varieties of coal, iron concentrate, copper concentrate, phosphorus concentrate, limestone, bauxite and other 25 as much.
The solid concentration of pulp is between 60% and 70%. The delivery flow depends on the solid transport capacity, solid density and pulp concentration. The particle size distribution and the concentration of the slurry ensure that the sedimentation velocity and the laminar flow rate are less than 1.5 m / s, which can ensure that the design flow rate of the pipeline is in the range of 1.5 m / s to 2.0 m / s. The selection of the pipe diameter should be such as to achieve a flow rate at the design of the conveying capacity.
Welded steel pipe wall thickness requirements depend on the pipeline operating pressure, long-distance pipe is usually used in a variety of wall thickness of different grades of steel to reduce the demand for welded pipe, according to the allowable operating pressure to calculate the pipe wall thickness, In order to leave a margin for the expected loss of corrosion during the economic life of the pipeline. Long-distance ore pulp pipe can be selected seamless steel pipe, ERW steel pipe, LSAW steel pipe. Taking into account the economic and transportation of pipeline investment, the general use of ERW steel pipe and LSAW steel pipe. From the pipe management process, the application of the heat treatment process by the ERW steel pipe is better than the wide seam of LSAW steel pipe.
Compared with other means of transport (such as railways and highways), it has the technical reliability of storage and transportation, safety in operation, cost economy and energy saving and environmental protection.
The specification and standard of long - distance slurry pipeline
Steel pipes should comply with specifications and standards:
ASME B31.11 mud transport piping system; ASME section v non-destructive inspection; ASME section ix boiler and pressure vessel label; welding and brazing procedure qualification standards; welder, brazing and welding and brazing operation procedures; AWS1.1 structure welding standard ; API 5l American Petroleum Association main pipeline specifications; API RP 5L1 rail transport main line of the proposed practice; API RP 5L5 maritime transport main line of the proposed practice; API Q1 standard quality procedures.
